Hey guys,
I have a differential drive robot in Gazebo where the drive wheels aren't colliding with the floor for some reason:

I have a "collision" tag in the link, but it doesn't seem to be working. I'm using gazebo 9 with ros kinetic.
Below is my xacro:
0 0 1 1 0.01 0.001 0 0 1 1 0.001 0.001 Gazebo/Grey transmission_interface/SimpleTransmission EffortJointInterface 1 Gazebo/Blue 0.025 0 0.1 0 0 0 false 40 1080 1 -2.35619449019 2.35619449019 0.3 30.0 0.001 ${topic_name} ${prefix}_laser_link true 1 true true 100.0 left_drive_wheel_joint right_drive_wheel_joint ${drive_wheel_separation} ${drive_wheel_radius} 1 10 10 100.0 cmd_vel odom odom base_link
Any help would be highly appreciated!
Thanks!
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